Technician A says that aluminum brake drums use cast iron ...

[skymedlock]

Technician A says that aluminum brake drums use cast iron friction surfaces. Technician B says that up to 0.030 in. (0.8 mm) should be left after machining a drum to allow for wear. Which technician is correct?
 
  A) Technician A only B) Technician B only C) Both technicians D) Neither technician

Question 2

A 3000 pound vehicle is calculated to have a kinetic energy of 90,000 ft-lb at 28 mph. If the speed of the vehicle remains the same and the weight is doubled to 6000 pounds, what will happen to the calculated kinetic energy?
 
  A) It will increase by the square (x 4), to 360,000 ft-lb
  B) It will remain the same
  C) It will increase proportionally (x 2), to 180,000 ft-lb
  D) None of these is correct

[bbburns21]

Answer to Question 1

C

Answer to Question 2

C